CVE-2021-24423 UpdraftPlus < 1.16.59 - Admin+ Stored Cross-Site Scripting
High-privilege users can inject malicious JavaScript into UpdraftPlus settings, leading to stored cross-site scripting attacks against other administrators.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-24423?
CVE-2021-24423 is a medium-severity cross-site scripting vulnerability in Unknown UpdraftPlus WordPress Backup Plugin, published on 24 Jan 2022. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The UpdraftPlus WordPress Backup Plugin WordPress plugin before 1.6.59 does not sanitise its updraft_service settings, allowing high privilege users to set malicious JavaScript payload in it and leading to a Stored Cross-Site Scripting issue
Weakness: CWE-79
Which versions are affected by CVE-2021-24423?
It affects 1 product.
Products include Updraftplus Updraftplus.
How do I fix CVE-2021-24423?
No fix has been published for CVE-2021-24423 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-24423 being exploited?
There is no known exploitation of CVE-2021-24423 in the wild and no public exploit code.
Other vulnerabilities in Unknown UpdraftPlus WordPress Backup Plugin
- CVE-2017-16870 Server-side request forgery in n/a
- CVE-2017-16871 Race condition in n/a
- CVE-2023-32960 WordPress UpdraftPlus Plugin <= 1.23.3 is vulnerable to Cross Site Request Forgery (CSRF)
- CVE-2022-0633 UpdraftPlus Free < 1.22.3 & Premium < 2.22.3 - Subscriber+ Backup Download
- CVE-2022-0864 UpdraftPlus < 1.22.9 - Reflected Cross-Site Scripting
Sources
Also known as GHSA-4v9q-rjxq-3952.